pick your battles. it's really not his job to be the handyman. he's no longer obligated. it's a favor, really, and if a friend says they will do you a favor and don't, then maybe it's time to stop asking or accepting offers to help. that will help stop the expectations (which lead to all kinds of negatives).
as far as your things, maybe just ask him first if he was in there and what he was after?
i know it's not fair that he's with another and yet, still treats you with so much familiarity. it must feel as if he has the best of both worlds, huh?
M:63 H:53 S:41, SS:28, SS:25, SD:23 M:15 T:16
Bomb:12/17/11, "I think we should go our separate ways." H moves to his mother's house, 4/1/12 12/21/12: H moves back home, piecing